Anterior urethral diverticulum associated with posterior urethral valves.
D004200:Diseases in Twins; D004240:Diverticulum / Q000151:congenital*; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000209:etiology / Q000235:genetics; D008297:Male; D014521:Urethra / Q000002:abnormalities*; D014522:Urethral Diseases / Q000151:congenital*; D014524:Urethral Obstruction / Q000209:etiology / Q000235:genetics